Intraoral device

ABSTRACT

An intraoral device includes a one-piece, flexible, injection molded body made of a single homogeneous material. The body includes upper front and rear flaps, and lower front and rear flaps. Upper edges of the front flaps and lower edges of the lower flaps are sealed by respective upper and lower parts of a patient&#39;s mouth to form upper and lower evacuation channels when the body is disposed within the patient&#39;s mouth. Evacuation holes in the flaps are in communication with the evacuation channels. A connection section is in communication with the evacuation channels and is configured to extend outside of the patient&#39;s mouth to connect with a vacuum source for evacuating fluid from the patient&#39;s mouth through the evacuation holes and the evacuation channels.

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a continuation of Ser. No. 10/375,230 filed on Feb. 27, 2003,which issued on Dec. 13, 2005 as U.S. Pat. No. 6,974,321, which is acontinuation-in-part of prior application Ser. No. 10/006,732 filed Nov.15, 2001, which issued on Jan. 15, 2002 as U.S. Pat. No. 6,575,746,which is a continuation of prior U.S. application Ser. No. 09/777,491,filed Feb. 5, 2001, now U.S. Pat. No. 6,338,627, which is a continuationof prior application Ser. No. 09/490,923 filed on Jan. 25, 2000, whichis now abandoned, which is a continuation of prior application Ser. No.09/193,916 filed on Nov. 17, 1998, which issued on Feb. 8, 2000 as U.S.Pat. No. 6,022,214. These applications are hereby incorporated byreference in their entirety.

FIELD OF THE INVENTION

The invention relates, in general, to dental appliances, and, inparticular, to dental appliances for illuminating and/or vacuum suctionof the mouth of a dental patient for examination and/or operativepurposes.

BACKGROUND OF THE INVENTION

Illuminating the interior of a dental patient's mouth during dentalexamination and/or operation is difficult because the patient's mouthmust be illuminated through a narrow opening, i.e., the patient's mouth,and the dentist must work in close proximity to the mouth, oftenblocking the light source. Proper illumination is essential for dentalexamination and/or operation.

The oral cavity is typically illuminated by a focused light sourcemounted approximately two to three feet above a dental chair that thepatient rests on. The light source is configured to direct light ontoand into the patient's mouth. The amount of light entering the oralcavity using this type of lighting is somewhat limited due to the factthat the light source is remote from the patient's mouth. Additionally,the dentist or oral surgeon must often position oneself or his or herinstruments between the light source and the patient's mouth to properlyview the patient's mouth, blocking light from entering the mouth. Theblocking of light casts an effective shadow in the patient's mouth or inareas of the patient's mouth such as certain teeth.

In order to inhibit this blocking or shadowing, fiber optic lighting hasbeen incorporated into handheld dental instruments. Typically, one ortwo fiber optic strands extend longitudinally along the instrument andinclude a light outlet end configured to direct light towards the end ofthe instrument. However, this type of lighting has a number ofdrawbacks. Light is only directed on a limited area in the mouth anddoes not provide illumination for the entire oral cavity. Additionally,the presence of this type of lighting, typically as an add-on feature onthe instrument interferes with the comfortable and proper use of theinstrument. The fiber optic bundles also-degrade over time because thefiber optics and instrument go through autoclaving numerous times.Components of the instrument, e.g., turbines, may be easily changed oncedegraded but the fiber optic bundles can not.

Other devices have been designed specifically for illuminating apatient's teeth, but these devices suffer from any or all of thefollowing drawbacks: inadequate illumination of the patient's teeth, andinterference with other dental instruments used during the examinationand/or operation.

SUMMARY OF THE INVENTION

An aspect of the invention involves a one-piece, injection-moldedintraoral device. The intraoral device includes a one-piece, flexible,injection molded body made of a single homogeneous material. The bodyincludes an upper front flap including an upper edge, an upper rear flapincluding an upper edge separated from the upper edge of the upper frontflap by a gap, a lower front flap including a lower edge, and a lowerrear flap including a lower edge separated from the lower edge of thelower front flap by a gap. The upper edges of the front flaps areconfigured to be sealed by an upper part of a patient's mouth and forman upper evacuation channel when the body is disposed within thepatient's mouth. The lower edges of the lower flap are configured to besealed by a lower part of a patient's mouth and form a lower evacuationchannel when the body is disposed within the patient's mouth. One ormore evacuation holes in at least one of the upper flaps are incommunication with the upper evacuation channel and one or moreevacuation holes in at least one of the lower flaps are in communicationwith the lower evacuation channel. A connection section is incommunication with the upper evacuation channel and the lower evacuationchannel and is configured to extend outside of the patient's mouth toconnect with a vacuum source for evacuating fluid from the patient'smouth through the evacuation holes and the evacuation channels.

Another aspect of the invention involves a one-piece, injection-moldedintraoral device. The intraoral device includes a one-piece, flexible,injection molded body made of a single homogeneous material. The bodyincludes a flexible upper portion that contacts an upper part of thepatient's mouth when the body is disposed within the mouth of thepatient and a flexible lower portion that contacts a lower part of thepatients mouth when the body is disposed within the mouth of thepatient. One or more evacuation holes are in at least one of the upperportion and the lower portion, and one or more evacuation channels arein communication with the one or more evacuation holes. A connectionsection is in communication with the one or evacuation channels andconfigured to extend outside of the patient's mouth to connect with avacuum source for evacuating fluid from the patient's mouth through theone or more evacuation holes and the one or more evacuation channels. Aflexible bite piece of the intraoral device is vertically compressible,longitudinally displaceable, and laterally displaceable.

A further aspect of the invention involves a vacuum-only adapter forconnecting a vacuum source without illumination capability to anintraoral illumination device. The intraoral illumination deviceincludes a body that is inserted within a patient's mouth. The bodyincludes one or more evacuation holes in communication with one or moreevacuation channels to remove fluid from the patient's mouth. Anillumination member of the intraoral illumination device illuminates aninterior of the patient's mouth. A bite piece of the intraoralillumination device is engaged by a patient's teeth to hold the body inplace within the patient's mouth. A connection section of the intraoralillumination device includes an illumination connector that is opticallycoupled to the illumination member and a vacuum connector that is incommunication with the one or more evacuation channels. The vacuum-onlyadapter includes a plug portion configured to be matingly received bythe connection section, a handling portion extending proximally from theplug portion and configured to be handled by a patient, a plug extendingdistally from the plug portion and configured to mate with theillumination connector to plug the illumination connector, and one ormore vacuum lumens carried by the plug portion to communicate with thevacuum connector channels to remove fluid from the patient's mouth.

Other, more particular features and advantages of the inventions are setforth in the following detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings illustrate both the design and utility of preferredembodiments of the present invention, in which similar elements arereferred to by common reference numbers, wherein:

FIG. 1 is a front perspective view of a preferred embodiment of theintraoral illumination device of the present invention shown inside apatient's mouth;

FIG. 2 is a front perspective view of the components of the intraoralillumination device illustrated in FIG. 1 in a disassembled state;

FIG. 3 is a front perspective view of the intraoral illumination deviceillustrated in FIG. 1;

FIG. 4 is a rear perspective view of the intraoral illumination deviceillustrated in FIG. 1;

FIG. 5 is a top plan view of the intraoral illumination deviceillustrated in FIG. 1;

FIG. 6 is a front elevational view of the intraoral illumination deviceillustrated in FIG. 1;

FIG. 7 is an end view of the intraoral illumination device illustratedin FIG. 1;

FIGS. 8A and 8B are cross-sectional views of the intraoral illuminationdevice illustrated in FIG. 1 and illustrate the evacuation of fluidsthrough the evacuation system of the device;

FIG. 9 is a front perspective view of an alternative preferredembodiment of the intraoral illumination device;

FIG. 10 is a rear perspective view of the intraoral illumination deviceillustrated in FIG. 9;

FIG. 11 a is a partial perspective view of an alternative embodiment ofan integrated light carrier and vacuum tube connector;

FIG. 11 b is a partial perspective view of an alternative embodiment ofan integrated light carrier and vacuum tube that the integrated lightcarrier and vacuum tube connector illustrated in FIG. 11 may beconnected with;

FIG. 12 is a front perspective view of an alternative preferredembodiment of the intraoral illumination device and shows the intraoralillumination device in conjunction with a preferred embodiment of amulti-lumen tube;

FIG. 13 is a rear, top perspective view of a preferred embodiment of alight dispersion piece that may be used with the intraoral illuminationdevice illustrated in FIG. 12;

FIG. 14 is a cross sectional view of a connection section of theintraoral illumination device and an end portion of the multi-lumentube;

FIG. 15 is a cross sectional view of the multi-lumen tube taken alonglines 15-15 of FIG. 14;

FIG. 16 is a perspective view of an embodiment of a transition mechanismthat may be used to transition a separate light carrier and vacuum tubeinto the single multi-lumen tube; and

FIG. 17 is perspective view of an embodiment of a connector that may beused to couple the transition mechanism to the multi-lumen tube.

FIG. 18A is a front perspective view of a further embodiment of anintraoral illumination device in conjunction with an embodiment of anoptional vacuum-only adapter shown separated from the intraoralillumination device.

FIG. 18B is a rear perspective view of the intraoral illumination deviceand the optional vacuum-only adapter illustrated in FIG. 18A.

FIG. 19A is a front elevational view of the intraoral illuminationdevice illustrated in FIG. 18A.

FIG. 19B is a left side elevational view of the intraoral illuminationdevice illustrated in FIG. 18A.

FIG. 19C is a bottom plan view of the intraoral illumination deviceillustrated in FIG. 18A.

FIG. 19D is a right side elevational of the intraoral illuminationdevice illustrated in FIG. 18A.

FIG. 19E is a rear elevational view of the intraoral illumination deviceillustrated in FIG. 18A.

FIG. 20A is a front elevational view of the intraoral device adapterillustrated in FIG. 18A.

FIG. 20B is a left side elevational view of the intraoral device adapterillustrated in FIG. 18A.

FIG. 20C is a bottom plan view of the intraoral device adapterillustrated in FIG. 18A.

FIG. 20D is a right side elevational view of the intraoral deviceadapter illustrated in FIG. 18A.

FIG. 20E is a rear elevational view of the intraoral device adapterillustrated in FIG. 18A.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

With reference to FIGS. 1 and 2, a preferred embodiment of an intraoralillumination device, indicated generally by the reference numeral 20,will now be described. The intraoral illumination device 20 generallyincludes a tongue and cheek retractor 22, a dispersion piece 24, and abite block or piece 26. The tongue and cheek retractor 22 is adisposable piece, and the dispersion piece 24 and bite piece 26 aresterilizable for reuse. The dispersion piece 24 is coupled to a lightcarrier such as a fiber optic bundle 28 and extraoral light source 30for illuminating the dispersion piece 24. A fluid evacuation tube 32 isin communication with the bite block 26 and a fluid evacuation system 34of the device 20 for evacuating fluids from a patient's mouth 36.

The intraoral illumination device 20 will now be described generally inuse. The patient opens his or her mouth 36 and a health care providerinserts the device 20 into an intraoral cavity 38 of the patient's mouth36 between the patient's upper jaw 40 and lower jaw 42. The patientrests his or her jaws 40, 42 during the process to be performed bygently biting on the bite block 26 with his or her rear teeth 44. Tohelp isolate the area of the mouth 36 being worked on and protect thepatient's mouth from being injured by the dental tools, the tongue andcheek retractor 22 urges the patient's cheek and tongue away from thearea of isolation. Fluids produced in the patient's mouth 36 during theprocess are removed through the fluid evacuation system 34 of the device20 and vacuum tube 32. Light transmitted through the light carrier 28 tothe dispersion piece 24 is dispersed outward from the dispersion piece24, towards the front of the patient's mouth, from a rear, central partof the intraoral cavity 38 flooding the patient's mouth with light.Illuminating the area of interest in the patient's mouth in this mannereliminates the aforementioned problems with blocked light or shadowing.

Although this invention has been described in connection withilluminating, isolating, and removing fluids from a patient's mouth fordentistry, it will be readily understood by those skilled in the art howthe present invention may have other mouth-related applications whereillumination in the mouth is required other than dentistry such as, butnot by way of limitation, oral surgery.

With reference to FIGS. 1-7, each of the components of the device 20will now be described. The tongue and cheek retractor 22 is made of asingle molded piece of soft, flexible, biocompatible material such asPebax, santoprene, or a molded vinyl material. However, it will bereadily understood by those skilled in the art that other soft, flexiblematerials could be used. The tongue and cheek retractor 22 is preferablyproduced by a gas-assist injection molding process in order to producethe internal vacuum channels described below. However, it will bereadily understood by those skilled in the art that other moldingprocesses such as an injection molding process could also be used. Asdiscussed in more detail below, the tongue and cheek retractor 22 may bea separate piece that can be easily added to or removed from thedispersion piece 24. The tongue and cheek retractor 22 also may come intwo different main configurations, depending on the side of the mouthbeing examined and/or operated on, i.e., left side, right side, anddifferent sizes for different size and shaped mouths. The retractor 22has an inner surface 46 and an outer surface 48.

The retractor 22 includes a curved main body portion 50 and a cheekretractor portion 52.

The main body portion 50 includes an upper roof portion 54 configured torest against the roof of the patient's mouth 36 during use and a lowertongue retractor portion 56 to keep the tongue protected and retracted.The lower tongue retractor portion 56 helps to isolate the area ofinterest in the mouth 36 and protect the tongue from instruments such asdental drills during the dental procedure. The tongue retractor portion56 includes internal evacuation channels 58. Evacuation holes 60 on boththe inner surface 46 and outer surface 48 of the tongue retractorportion 56 communicate with the evacuation channels 58. The evacuationchannels 58 terminate at an upper part of the tongue retractor portion56 at a main receiving channel 62. The main receiving channel 62includes a lip 64 for slidably receiving the dispersion piece 24. A pairof shallow evacuation channels 66 extend along a portion of the mainreceiving channel 62. Evacuation holes 66 allow communication of theevacuation channels 58 with the outer surface 48 of the retractor 22.

The cheek retractor portion 52 has a curved, fish-tail shape andincludes a pair of evacuation channels 68 exposed to the outer surface48 of the retractor 22 that communicate with the evacuation channels 66.The cheek retractor portion 52 protects adjacent cheek tissue during thedental procedure and helps to isolate the area of interest of the mouth36 during the dental procedure by retracting the cheek tissue.

The dispersion piece 24 is an illumination member and is preferably madeof a single, injection-molded piece of light-dispersive, biocompatible,sterilizable material. The dispersion piece 24 may be made of a rigidmaterial such as acrylic or a flexible material such as a moldedflexible urethane. However, it will be readily understood by thoseskilled in the art that other clear, flexible or rigid materials may beused. The dispersion piece 24 preferably has an arcuate, semi-circularshape and includes a generally U-shaped dispersion lens 70, a fluidevacuation portion 72, and a pivot portion 74.

The dispersion lens 70 includes a flange 76 that is slidably received bythe lip 64 of the main receiving channel 62 for attaching the dispersionpiece 24 to the tongue and cheek retractor 22. The dispersion lens 70may have a composition that is varied, e.g., graduated, to control theamount of dispersion in different areas of the lens 70 and evenlydistribute the overall rumination. This helps prevent “hot spots” in thedispersion lens 70, i.e., areas of the lens 70 that emit a greaterconcentration of light. These “hot spots” make it difficult for thehealth care provider to observe the patient's mouth. For example, in thearea where the fiber optic bundle 28 connects with the dispersion lens70, there may be a less textured composition to inhibit the breaking upof internal reflections, and a progressively more textured compositionas one approaches the opposite end of the lens 70. It will be readilyunderstood by those skilled in the art that the tongue and cheekretractor 22 or other covering may have a similar varied composition tocontrol dispersion of light in a similar manner. The dispersion lens 70optically communicates with the light carrier 28 through a stem 78 and aseparate connector 79. The light carrier 28 is preferably adapted to bedirectly connected to a commercially available illumination source asthose found in most dentist offices or adapted to be connected to suchsources through a connector or transition mechanism (not shown).Alternatively, the stem 78 and connector 79 may be a single integratedmolded piece. The stem 78 serves as a light coupling between the lightcarrier 28 and dispersion lens 70.

In use, light shines outward from the lens 70 and is scattered by thelens 70 to illuminate the patient's mouth 36. When in place, theconfiguration of the device 20 causes light to be transmitted by thedispersion lens 70 from a central, rear part of the intraoral cavity,substantially between the patient's rear teeth 44. The U-shapeddispersion lens 70 has a generally 180 degree arcuate shape. Thisgenerally 180 degree arcuate shape and the dispersional qualities of thelens 24 spread the total area of illumination. Illuminating the mouthfrom the central, rear part of the intraoral cavity and theabove-described attributes of the lens 24 eliminate shadows caused by asingle-point light source, and shadows caused by the health careprovider or equipment used by the health care provider. The intraoralillumination device 20 may replace or be used with dental instrumentsincluding fiber optic lighting.

The fluid evacuation portion 72 includes a first main evacuation channel80 and a second main evacuation channel 82 for evacuating fluids fromthe device 20.

The pivot portion 74 includes a first well 84 and a second well 86 thatrespectively communicate with the first and second main evacuationchannels 80, 82. A first recess 88 and second recess 90 are used tofurther communicate the wells 84, 86 with the fluid evacuation tube 32in a manner to be described. Respective pivot pins 92 extend from eachwell 84, 86.

The bite block 26 is made of a single piece of biocompatible,sterilizable material such as rubber. The bite block 26 may be formed bya compression molding process, a transfer molding process, a castingprocess, an injection molding process, or similar process. The biteblock 26 includes ribs 94 and ridges 96 along opposite faces 98 of thebite block 26. The ribs 94 and ridges 96 help to prevent the bite block26 from slipping between the molar and bicuspid teeth 44 of the patient.When held or engaged between the patient's teeth, the bite block 26functions to hold the dispersion lens 70 in a rear, central part of theinterior cavity of the patient's mouth so that light can be transmittedoutward therefrom for illuminating the interior cavity.

A pivot portion 100 of the bite block 26 includes opposite receivinggrooves 102. The receiving grooves 102 receive the pivot pins 92 of thedispersion lens 70 for pivotally connecting the dispersion piece 24 andtongue and cheek retractor 22 to the bite block 26. This pivotingability allows the health care provider to adjust, i.e., swivel, thedispersion piece 24 and tongue and cheek retractor 22 to accommodatepatients with different arch widths.

The intraoral illumination device 20 may also come in different sizesand to accommodate different mouth sizes and shapes.

In an alternative embodiment of the device (FIGS. 9, 10, 12), thedispersion piece 24 and bite piece 26 are not pivotally connected toeach other, i.e., the connection is fixed. If the connection is fixed,it is especially important to provide the intraoral illumination device20 in different configurations and sizes to accommodate the differentmouth sizes and shapes. Likewise, if the device (FIGS. 9, 10, 12) isdisposable, it is important to provide the device in differentconfigurations and sizes to accommodate the different mouth sizes andshapes.

The bite block 26 includes an internal evacuation channel 104 incommunication with the first and second main evacuation channels 80, 82through the first and second recesses 88, 90, respectively, forevacuating fluids from the patient's mouth 36 during the procedure. Therecesses 88, 90 are sized to allow constant sealed communication of theinternal evacuation channel 104 with the main evacuation channels 80,82, regardless of the pivoted position or articulation of the dispersionpiece 24 and tongue and cheek retractor 22. External evacuation channels106 are located on the outside of the bite block 26 and are incommunication with the internal evacuation channel 104 for furtherremoval of fluids from the mouth 36. Fluids are vacuumed from theinternal evacuation channel 104 of the bite block 26 through an exitport 108.

During use, the patient rests his or her jaws 40, 42 on the faces 98 ofthe bite block 26, eliminating the need to strain one's jaw muscles tokeep the mouth open. This resting of the jaws 40,42 causes the biteblock 26 to hold the dispersion piece 24 and tongue and cheek retractor22 in the rear, central part of the oral cavity. The bite block 26 alsoserves as an evacuation exit for fluids and as a means for positioningand holding the dispersion piece 24 and tongue and cheek retractor 22 inthe oral cavity.

Before inserting the intraoral illumination device 20 in the patient'smouth 36, the heath care provider ensures that the intraoralillumination device 20 is configured for examining and/or operating onthe specific area of the patient's mouth of interest, i.e., right side,left side. If the device 20 includes a replaceable tongue and cheekretractor 22, the tongue and cheek retractor 22 used with the device 20should be the proper configuration and size for the area of thepatient's mouth of interest. A tongue and cheek retractor 22 specific tothe size and area of the mouth of interest is added to the dispersionpiece 24 by sliding the flange 76 of the dispersion lens 70 into themain receiving channel 62 of the tongue and cheek retractor 22.Alternatively, if the device is disposable (FIGS. 9, 10, 12), a devicespecific to the size and area of the mouth of interest is used. Thedevice is then inserted into the patient's mouth 36 in the mannerdescribed above. If the provider desires to examine the opposite side ofthe patient's mouth 36, the health care provider removes the device 20from the patient's mouth, removes the tongue and cheek retractor 22 fromthe dispersion piece 24 by sliding the retractor 22 off of the flange76, flips the bite block 26 and dispersion piece 24, which are commonfor both sides of the mouth 36, adds a new tongue and cheek retractor 22configured for use with the opposite side of the mouth 36, and placesthe device 20 back into the patient's mouth 36 so that bite block 26resides in the opposite side of the patient's mouth 36. Alternatively,if the device is disposable, the health care provider must ensure that adevice adapted for use with the size and side of the mouth beingexamined is used. After use of the intraoral illumination device 20, thetongue and cheek retractor 22 is disposed and the bite piece 26 anddispersion piece 24 are autoclaved or sterilized by a similar method. Ifa disposable intraoral illumination device is used, the device is simplydisposed of in a proper biohazardous receptacle.

With reference to FIGS. 8A and 8B, the fluid evacuation system 34 of theintraoral illumination device 20 will now be described in greaterdetail. During dental examination and/or operation, a number of fluids,e.g., saliva from the parotid gland, blood, water from the dentalequipment, are produced in the patient's mouth 36. It is important toremove these fluids for the comfort of the patient, to prevent fluidsand material from being aspirated into the throat or lungs of thepatient, and to assist the health care provider in observing and/oroperating within the patient's mouth 36. The fluid evacuation system 34removes fluids from all areas of the mouth, e.g., operating side,vestibule area on the operation side, the lingual vestibule (along theside of the tongue), contra-lateral side vestibule, eliminating the needfor constant patient mouth rinsing and the need for a dental assistantto aspirate debris.

The fluid evacuation system 34 is comprised of the aforementionedevacuation channels and holes located in fluid evacuation members suchas the tongue and cheek retractor 22, dispersion piece 24, and biteblock 26. As used herein, the term “fluid evacuation member” refers to apiece that includes one or more evacuation channels for removing fluidsfrom the patient's mouth. For example, as illustrated in FIGS. 8A and8B, fluid is drawn from the tongue area through the evacuation holes 60and evacuation channels 58 in the tongue retractor portion 56. Thisfluid is further drawn through the second main evacuation channel 82 ofthe dispersion piece 24, and the bite block 26, and out the vacuum tube32. The suction drawing the fluids and debris out the vacuum tube 32 isprovided by a vacuum source 110 (FIG. 1).

With reference to FIGS. 9 and 10, an intraoral illumination device 112constructed in accordance with an alternative preferred embodiment ofthe invention will now be described. Elements of the intraoralillumination device 112 similar to those described above with respect tothe intraoral illumination device 20 are referred to by common referencenumbers, but with an “a” suffix, e.g., dispersion piece 24 a. Theintraoral illumination device 112 is similar to the intraoralillumination device described above, except it is adapted for use as adisposable unit, eliminating the need for sterilization and theassociated costs and spread-of-disease risks. The device 112 includes anintegrated bite block and light carrier/fluid evacuation tube connector114. The connector 114 is an over-molded piece, has a bitumenconfiguration, and is configured to extend significantly outside of themouth of the patient where it connects with a combined bitumen lightcarrier and vacuum tube 116. Because this connection between theconnector 114 and combined light carrier and vacuum tube 116 issubstantially outside of the patient's mouth, the combined light carrierand vacuum tube 16 can be re-used, i.e., does not have to be disposableand does not need to be autoclaved, avoiding degradation, especially ofthe light carrier, e.g., fiber optic bundle. As discussed above, thebite block 26 a and dispersion piece 24 a may be fixed relative to eachother. Alternatively, as discussed above, the dispersion piece 24 a maybe pivotally connected to the bite block 26 a in order to accommodatedifferent size arch widths. Regardless, the bite block 26 a, dispersionpiece 24 a, and tongue and cheek retractor 22 a together form a single,integrated disposable piece.

With reference to FIGS. 11A and 11B, an alternative embodiment of anintegrated bite block and light carrier/fluid evacuation connector 118and combined light carrier and vacuum tube 120 are shown. In thisembodiment, the light carrier portions and fluid evacuation portions arecoaxially aligned.

With reference to FIGS. 12 and 13, an intraoral illumination device 122constructed in accordance with an additional preferred embodiment of theinvention will now be described. Elements of the intraoral illuminationdevice 122 similar to those described above with respect to theintraoral illumination devices 20, 112 are referred to by commonreference numbers, and with a “b” suffix. Similar to the intraoralillumination device 112 described above, the intraoral illuminationdevice 122 is adapted for use as a disposable unit, eliminating the needfor autoclaving and the associated costs and spread-of-disease risks.The device 112 preferably has a two-piece, integrated construction. Thedevice includes a dispersion piece 124 surrounded by a tongue and cheekretractor 126.

The dispersion piece 124 is preferably made of single, rigid,light-dispersive material such as acrylic or a flexible material such asa molded flexible urethane. However, it will be readily understood bythose skilled in the art that other clear, flexible or rigid materialsmay be used. The dispersion piece 124 has an arcuate, light-dispersingsection 128, a bite block section 130, and an optical connection section132. The light-dispersing section 128 is received within a mainreceiving channel 134 of the tongue and cheek retractor 126. Thelight-dispersing section 128 may have a composition that is varied,e.g., graduated, to control the amount of dispersion in different areasof this section 128 and evenly distribute the overall rumination. Thebite block section 130 includes a generally rigid support structure forthe bite block. The optical connection section 132 is configured tooptically connect the light-dispersing section 128 to the light sourcethrough a light carrier such as a fiber optic bundle.

The tongue and cheek retractor 126 includes a main body section 50 b, acheek retractor portion 52 b, an upper roof portion 54 b, and a tongueretractor portion 56 b. Fluid evacuation channels (not shown) within thetongue and cheek retractor 126 communicate with the outside of thetongue and cheek retractor (such as through evacuation holes 60 b) toremove fluids from the patient's mouth. The fluid evacuation channelscommunicate with the main evacuation channel 134. The tongue and cheekretractor 126 includes a bite block 136 and a connection section 138.The connection section 138 is configured to extend outside of apatient's mouth and attach to a multi-lumen tube 140. The connectionsection 138 includes a retention barb 142. The connection section 138also houses a pair of fluid evacuation channels 144 and the opticalconnection section 132.

The multi-lumen tube 140 includes fluid evacuation lumens 146 in orderto communicate the fluid evacuation system in the device 122 with avacuum source and a light carrier 148 in order to optically couple thedispersion piece 124 with a light source. The multi-lumen tube 140includes a connector 150 for attaching the intraoral illumination deviceto the multi-lumen tube 140. A slot 152 in the connector 150 isconfigured to receive and retain the retention barb 142 when theconnection section 138 is fully engaged with the multi-lumen tube 140.

With reference to FIG. 16, an embodiment of a transition mechanism 154to transition a pre-existing light carrier 156 and a vacuum tube 158 atthe health care provider's into the single, multi-lumen tube 140 isshown. The transition mechanism 154 includes the appropriate connectionsfor attachment to pre-existing light carriers 156 and vacuum tubes 158or may include separate connectors for interfacing between lightcarriers 156 and vacuum tubes 158 and the transition mechanism 154. Inan alternative pre-embodiment, the transition mechanism 154 may includea light source and/or a vacuum source, eliminating the need to connectwith a light carrier 156 and/or vacuum tube 158. With reference to FIG.17, a special connector 160 may interface between the transitionmechanism 154 and the multi-lumen tube 140 to further transition thetransition mechanism 154 into the multi-lumen tube 140. However, it willbe readily apparent to those skilled in the art how transitioningdevices such as the special connector 160 may be located within thetransition mechanism 154, eliminating the need for a special connector.

Together, the intraoral illumination device 122, multi-lumen tube 140,transition mechanism 154, and light source form an intraoralillumination system and the intraoral illumination device 122 inconjunction with one or more of the following form an intraoralillumination kit: the multi-lumen tube 140, the transition mechanism154, the light source, the vacuum source, the special connector 160, andseparate connector(s) for attaching light carrier 156 and/or vacuum tube158 to the transition mechanism 154.

The method of manufacturing the intraoral illumination device will nowbe described. The intraoral illumination device is manufactured in atwo-step process known as multi-shot injection molding. The acrylicdispersion piece 124 is molded first in a two-piece mold including afirst mold having a first mold cavity and a second mold having a secondmold cavity, and, then, the second mold is removed. The second mold isreplaced by a third mold having a third mold cavity that has the detailsof the tongue and cheek retractor 126. Next, rubber is injected over thedispersion piece 124 to form the tongue and cheek retractor 126. Agas-assist injection molding process is then used to produce the fluidevacuation channels and cavities within the tongue and cheek retractor126. Fluid evacuation holes are created in various locations of thetongue and cheek retractor 126 to provide specific area suction within apatient's mouth. The fluid evacuation holes may be created by a lasercutting process, or similar cutting process.

The multi-lumen tube 140 is extruded with the light tube 148 enclosedwithin the tube 140. The light tube 148 is made from a semi-flexible,solid-core plastic, optical material such as a fiber optic bundle and.is covered with a cladding such as Teflon before extrusion. Withreference to FIG. 15, the multi-lumen tube 140 is extruded so as to havean elliptical shape with the light tube 148 in the center. The tube 140is extruded so that a portion of the light tube 148 extends beyond thedistal end of the multi-lumen tube 140. After extrusion, the multi-lumentube 140 is over-molded with a custom connector 150. Alternatively, theconnector 150 may be a separate piece made of a material such asstainless steel and fixed to the end of the tube 140. The connector 150is configured to inhibit leakage and ensure a tight connection with theconnection section 138 of the intraoral illumination device 122.

Thus, the intraoral illumination device of the present inventioneliminates the problem of shadowing resulting from overhead lightsources, single-point light sources, or other illumination sources ofthe past by transmitting dispersed light outwards from a rear, centralpart of the intraoral cavity, generally between the patient's rearteeth. The generally 180 degree arc of the dispersion piece spreads thearea of illumination, eliminating shadows caused from a single pointlight source. The fluid evacuation system of the device vacuums oralfluids, water delivered by a dental hand piece, and debris. The fluidevacuation system prevents these fluids and debris from being aspiratedor swallowed down the throat of the patient, improves the comfort of thepatient, eliminates the need of the patient to continually rinse his orher mouth, and reduces the amount of spray emitted from the patient'smouth. The tongue and cheek retractor retracts and protects the cheekand tongue of the patient, helping to reduce interference between theseparts of the mouth and the procedure. The bite block allows the patientto rest the muscles of mastication, eliminating the need to strain tokeep his or her mouth open. Because the device simultaneously removesfluids and debris, isolates the area of interest in the mouth, andilluminates the area of interest, the time of the procedure and the needfor an assistant is greatly reduced.

With reference to FIG. 18A-19E, an intraoral illumination device(hereinafter “intraoral device”) 200 constructed in accordance withanother embodiment of the invention will now be described. The intraoraldevice 200 preferably has a single-piece, integrated,homogenous-material, injection-molded construction. The intraoral device200 is preferably injection molded out of a translucent (e.g.,transparent), flexible, soft, elastic, resilient, biocompatiblethermoplastic elastomer. The intraoral device 200 is also verticallysymmetrical so that an upper half 210 is symmetric with respect to alower half 220. This allows the same intraoral device 200 to bepositioned on either the left side or the right side of the patient'smouth. The intraoral device 200 may also come in different sizes fordifferent-size mouths. The intraoral device 200 is also disposable aftereach use.

The intraoral device 200 may be used with an optional vacuum-onlyadapter 230 if intraoral illumination is not desired with the intraoraldevice 200. Further, in an alternative embodiment of the intraoraldevice 200, the intraoral device 200 may not include the illuminationaspects described in more detail below. In such an embodiment, theintraoral device 200 does not illuminate the patient's mouth.

The single-piece intraoral device 200 generally includes integratedtongue and cheek retractor 240, bite piece 250, and connection section570, each of which will be described in turn below.

The tongue and cheek retractor 240 has inner surfaces 260 and outersurfaces 270. The retractor 240 includes an incurved main body portion280 and a forwardly angled cheek retractor (or “whale tail”) portion 290joined by isthmus portion 300.

The retractor 240 includes an upper front flap 310, an upper rear flap320, a lower front flap 330, and a lower rear flap 340. The front flaps310, 330 and rear flaps 320, 340 are separated by upper gap 350 andlower gap 360, respectively. The flaps 320, 330, 340, 350 all extendfrom and share a common, central spine 365. The spine 365 extendslongitudinally a majority of the length of the retractor 240 and dividesthe upper half 210 from the lower half 220 of the intraoral device 200.In addition to serving as the intersection location for the flaps 320,330, 340, 350, the spine 365 may serve as a light pipe and a separatorfor an upper internal evacuation channel and a lower internal evacuationchannel. The upper front flap 310 and upper rear flap 320 includerespective S-shaped upper edges or rims 370, 380 and the lower frontflap 330 and the lower rear flap 340 include respective s-shaped loweredges or rims 390, 400.

The flaps 310, 320, 330, 340 include evacuation holes 410 adjacent theedges 370, 380, 390, 400. The evacuation holes 410 in the upper flaps310, 320 may be generally aligned with each other and communicate withan upper internal evacuation channel formed in the upper gap 350 and theevacuation holes 410 in the lower flaps 330, 340 are generally alignedwith each other and communicate with a lower internal evacuation channelformed in the lower gap 360. Although twenty evacuation holes 410 areshown, the number of evacuation holes 410 and/or location of theevacuation holes 410 may vary. The upper half 210 and/or the lower half220 may include zero or more evacuation holes 410. The number ofevacuation holes 410 in the upper half 210 may be the same or differentfrom the number of evacuation holes 410 in the lower half 220. In analternative embodiment, the evacuation holes may not be aligned witheach other.

The upper front flap 310 and the upper rear flap 320 are configured torest or flex against the paletal area or roof of the patient's mouth 36during use. The upper roof of the mouth spans the upper gap 350 andpushes or bends the upper front flap 310 and the upper rear flap 320forward to created a seal along the upper edges 370, 380, creating asealed upper internal evacuation channel in the upper gap 350. The lowerfront flap 330 and the lower rear flap 340 are configured to rest orflex against the lingual area of mouth or tongue to keep the tongueprotected and retracted during use. The tongue and floor of thepatient's mouth span the lower gap 360 and forms a seal along the loweredges 390, 400, creating a sealed lower internal evacuation channel inthe lower gap 360.

The cheek retractor portion 290 has an angled, curved, generallywhale-tail shape. In use, the cheek retractor portion 290 is flexedinward towards the main body portion 280 and rests against the innercheek tissue between the cheek tissue and the outside of the teeth. Withthe cheek retractor portion 290 flexed, the upper flaps 310, 320 andlower flaps 330, 340 are closed together, forming a seal along the upperedges 370, 380 and the lower edges 390, 400 of the retractor 240adjacent where the isthmus portion 300 and cheek retractor portion 290join. A front 420 and/or rear 430 of the cheek retractor portion 290 mayinclude texturing, detail, or a varied composition to disperse light andprevent “hot spots” that can make it difficult for the health careprovider to observe the patient's mouth, or lensing (e.g., fresnel lens)to focus light on different areas of the mouth.

With reference especially to FIGS. 19A and 19E, the cheek retractorportion 290 is shown as having a maximum height (or width) about ⅔ themaximum height (or width) of the main body portion 280. In alternativeembodiments, the cheek retractor portion 290 may have smaller or largermaximum heights. For example, in an alternative embodiment, the cheekretractor portion 290 may have a whale-tail shape as shown, but with amaximum height or width substantially the same as the maximum height orwidth of the main body portion 280.

When the tongue and cheek retractor 240 is positioned within thepatient's mouth (similar to that shown in FIG. 1), the flexed upperflaps 310, 320, the flexed lower flaps 330, 340, and the flexed cheekretractor portion 290 form an envelope for isolating an area of interestin the patient's mouth and protect the upper roof, tongue and cheek ofthe patient's mouth from instruments such as dental drills during thedental procedure and prevent aspiration of debris or dropped items intothe patient's throat.

The bite piece 250 includes symmetric, opposite tooth-engaging portions440 joined by an intermediate connection portion 450. The intermediateconnection portion 450 is more flexible than the tooth engaging portions440 and allows flexible, resilient, elastic movement of the toothengaging portions 440 in vertical, longitudinal, and lateral directionswith respect to each other to allow vertical, longitudinal, and lateralbiting movement by the patient for maximum biting comfort. The bitepiece 250 also may be moved or indexed forward and rearward a molarnotch to allow for better or more comfortable posterior or anteriorpositioning of the bite piece 250 and intraoral device 200.

The bite piece 250 allows 0-50% vertical compressibility (i.e., the bitepiece 250 may be compressed vertically when a patient bites on it from0% of the height of the bite piece 250 to as much as 50% of the heightof the bite piece in a general vertical direction V shown in FIG. 19E).In a preferred embodiment, the bite piece 250 allows at least 5%vertical compressibility, in a more preferred embodiment, the bite piece250 allows at least 10% compressibility, and in a most preferredembodiment, the bite piece 250 allows at least 15% verticalcompressibility.

The bite piece 250 allows 0-75% longitudinal displacement (i.e.,displacement of one tooth-engaging portion 440 0-75% of the width of thetooth-engaging portion 440 relative to the opposite tooth engagingportion 440 in a general longitudinal direction Lo shown in FIG. 19C).In a preferred embodiment, the bite piece 250 allows at least 5%longitudinal displacement, in a more preferred embodiment, the bitepiece 250 allows at least 10% longitudinal displacement, and in a mostpreferred embodiment, the bite piece 250 allows at least 15%longitudinal displacement of the tooth-engaging portions.

The bite piece 250 allows 0-20% lateral displacement (i.e., displacementof one tooth-engaging portion 440 0-20% of the length of thetooth-engaging portion 440 relative to the opposite tooth engagingportion 440 in a general lateral direction L shown in FIG. 19C). In apreferred embodiment, the bite piece 250 allows at least 2% lateraldisplacement, in a more preferred embodiment, the bite piece 250 allowsat least 4% lateral displacement, and in a most preferred embodiment,the bite piece 250 allows at least 6% lateral displacement of thetooth-engaging portions.

The intermediate connection portion 450 includes two opposite verticalwalls 460. Inner surfaces 470 of the two vertical walls 460, innersurfaces 480 of the tooth engaging portions 440, and an inner dividingwall 490 form a generally rectangular block-shaped suction cavity 500.The inner dividing wall 490 includes a pair of vacuum holes 510 to allowa vacuum force to be provided in the cavity 500 for suctioning fluids inthe area of the retro molar pad and the maxillary tuberosity of thepatient's mouth. The tooth engaging portions 440 include parallel,generally laterally extending tooth-engaging ridges 520. Thetooth-engaging ridges 520 include vertically extending cylindricalchambers 530. Disposed between the ridges 520 is a groove 540. At thebottom of the groove 540 are two adjacent, vertically extendingcross-shaped members 550. Vertically extending dividers 560 are disposedat ends of the cross-shaped members 550. The cross-shaped members 550and the vertically extending dividers 560 are biting surfaces that maybe engaged by the bottom of the top teeth and the top of the bottomteeth to help keep the bite piece 250 in position.

The connection section 570 extends from the bite piece 250 and aproximal portion 580 of the retractor 240. The connection section 570 isconfigured to extend outside of a patient's mouth and attach to amulti-lumen tube for delivering illumination and vacuum suction to theintraoral device 200 (or the vacuum-only adapter 230 for delivering onlyvacuum suction to the intraoral device 200).

The connection section 570 includes an open-ended tube 590 having agenerally elliptical cross-section that tapers slightly in height as thetube 590 intersects the bite piece 250 and the proximal portion 580 ofthe retractor 240. An interior of the open-ended tube 590 defines a mainvacuum channel 595. Adjacent the bite piece 250 and the proximal portion580 of the retractor 240, the connection section 570 includes acylindrical tube-shaped illumination connector 600 for transmittinglight to the spine 365 and for supporting the plug portion 640 or otherplug. On opposite vertical sides of the illumination connector 600,where the illumination connector 600 joins the proximal portion 580 ofthe retractor 240, upper and lower vacuum ports 610, 620 communicate themain vacuum channel 595 with the upper and lower internal evacuationchannels of the retractor 240. The main vacuum channel 595 communicateswith the suction cavity 500 through the vacuum holes 510 in the innerdividing wall 490. The wall of the tube 590 includes a pair of adjacent,vertically spaced slots 630 for retaining corresponding retention barbsin the plug portion 640 of the vacuum-only adapter 230.

With reference to FIGS. 20A-20E, the vacuum-only adapter 230 will now bedescribed in more detail. The adapter 230 includes a plug portion 640and a handling portion 650.

The plug portion 640 includes a generally elliptical outer cross-sectionthat is slightly smaller in dimension than the generally ellipticalcross-section of the tube 590 so that the tube 590 may slidingly receivethe plug portion 640. A cylindrical plug 660 slightly smaller indimension than the inner dimension of the illumination connector 600extends from a distal end 670 of the adapter 230. The cylindrical plug660 is matingly received by the illumination connector 600 when the plugportion 640 is plugged into the tube 590. The plug portion 640 includesa beveled surface 680 adjacent the distal end 670. When the plug portion640 is plugged into the tube 590, the beveled surface 680 engages acorresponding angled surface within the connection section 570. Thus,the beveled surface 680 may be used to ensure that the adapter 230 isproperly oriented when plugged into the connection section 570. With theplug portion 640 plugged into the connection section 570, the plugportion 640 helps to keep the bite piece 250 from collapsing in thefront. A pair of barbs 690 extend from the plug portion 640 on a sideopposite from the beveled surface 680. When the plug portion 640 isplugged into the tube 590, the barbs 690 engage the corresponding slots630 in the connection section 570 to retain the adapter 230 in theconnection section 570. A pair of vacuum lumens 700 extendlongitudinally within the adapter 230, along the cylindrical plug 660.Near a proximal end 710 of the adapter 230, each vacuum lumen 700 mayterminate in a receiver 720 for receiving cylindrical vacuum lines of avacuum hose.

The handling portion 650 may have an overall dimension slightly largerthan the dimension of the plug portion 640 and include opposite incurvedsides 730 to facilitate handling of the handling portion 650 with one'sfingers.

One or more further embodiments of the intraoral device may include oneor more of the implementations described immediately below.

A separate plug, adapter, or tube having one or more LEDs may plug intothe connection section of the intraoral device for illuminating theintraoral device.

The plug, adapter, or tube may include a heat sink for removing heatemitted from the one or more LEDs. An example heat sink may include afluid cooling system that circulates a cooling fluid (e.g., water) inthe area of the one or more LEDS. For example, vacuum tubing thatincludes one or more vacuum lumens to remove fluid from the patient'smouth may also carry a cooling fluid delivery lumen for deliveringcooling fluid to the region of the one or more LEDs. After removing heatfrom the region of the one or more LEDs, the cooling fluid may bewithdrawn through the one or more vacuum lumens.

The plug, adapter, or tube may include suitable electronics to controlintensity of light from the one or more LEDs.

A slidable/movable filter may be employed with a separate curing light.The movable filter may be moved to a first position to filter out lightthat causes composite filling material to cure, preventing curing, andmoved away from this position to allow light from the curing light tocure the composite filling material.

The plug, adapter, or tube may include a suction control mechanism thatprovides upper and lower evacuation channel control to control suctionto the upper evacuation channel, the lower evacuation channel or bothevacuation channels of the intraoral device.

The plug, adapter, or tube may include temperature control (e.g.,through the use of one or more temperature sensors such as a thermistor)to turn off the one or more LEDs if the temperature in the regionbecomes too high.

A proximal end of the tubing used to deliver vacuum suction,electricity, and cooling fluid may include a plug-in hook up orconnector to connect to vacuum, electricity, and water sources. Adjacenta proximal end of the tubing, an on/off switch may be located to actuatevacuum suction, electricity, and/or cooling fluid flow.

Using one or more LED's as the light source for the intraoral device inthe manner described above eliminates the need for lengthy and heavyfiber optics and allows the tubing to drop 90 degrees from patient'smouth to the floor. This eliminates the pulling on the side of thepatient's mouth caused by lengthy and heavy fiber optics in the past.

Although this invention has been described in terms of certain preferredembodiments, other embodiments apparent to those of ordinary skill inthe art are also within the scope of this invention. Accordingly, thescope of the invention is intended to be defined only by the claims thatfollow.

1. A one-piece, injection-molded intraoral device, comprising: a one-piece, flexible, injection molded body made of a single homogeneous material, the body including a spine; an upper front wall; an upper rear wall separated from the upper front wall by a gap, a lower front wall; a lower rear wall separated from the lower front wall by a gap; the upper walls joined along the spine to form an upper evacuation channel; the lower walls joined along the spine to form a lower evacuation channel; one or more evacuation holes in at least one of the upper walls and in communication with the upper evacuation channel; one or more evacuation holes in at least one of the lower walls and in communication with the lower evacuation channel, and a connection section in direct communication with both the upper evacuation channel and the lower evacuation channel and configured to extend outside of the patient's mouth to connect with a vacuum source for evacuating fluid from the patient's mouth through the evacuation holes and the evacuation channels.
 2. The intraoral device of claim 1, wherein the intraoral device includes a flexible bite piece where the one-piece, flexible, injection molded body and the connection section join.
 3. The intraoral device of claim 2, wherein the flexible bite piece extends rearwardly toward the rear of the patient's mouth when the intraoral device is positioned within the patient's mouth for use.
 4. The intraoral device of claim 2, wherein the flexible bite piece includes at least 15% vertical compressibility.
 5. The intraoral device of claim 2, wherein the flexible bite piece includes at least 15% longitudinal displaceability.
 6. The intraoral device of claim 2, wherein the flexible bite piece includes at least 6% lateral displaceability.
 7. The intraoral device of claim 2, wherein the flexible bite piece includes at least 15% vertical compressibility, at least 15% longitudinal displaceability, and at least 6% lateral displaceability.
 8. The intraoral device of claim 1, wherein the body includes an illumination member to be optically coupled to a light source for illumination of an interior of the patient's mouth.
 9. The intraoral device of claim 1, wherein the body terminates distally in a cheek portion that flexes when the body is disposed in the patient's mouth.
 10. The intraoral device of claim 1, wherein the lower walls form a tongue retractor portion.
 11. A one-piece, injection-molded intraoral device, comprising: a one-piece, flexible, injection molded body made of a single homogeneous material, the body including an upper front wall; an upper rear wall separated from the upper front wall by a gap, a lower front wall; a lower rear wall separated from the lower front wall by a gap; the upper walls joined to form an upper evacuation channel; the lower walls joined to form a lower evacuation channel that is not planar with the upper evacuation channel; one or more evacuation holes in at least one of the upper walls and in communication with the upper evacuation channel; one or more evacuation holes in at least one of the lower walls and in communication with the lower evacuation channel, a connection section in communication with the upper evacuation channel and the lower evacuation channel and configured to extend outside of the patient's mouth to connect with a vacuum source for evacuating fluid from the patient's mouth through the evacuation holes and the evacuation channels; and a flexible bite piece where the one-piece, flexible, injection molded body and the connection section join, the flexible bite piece having a surface to be engaged by several teeth of a user and being vertically compressible, longitudinally displaceable, and laterally displaceable, and extending substantially perpendicularly and rearwardly from where the one-piece, flexible, injection molded body and the connection section join toward the rear of the patient's mouth when the intraoral device is positioned within the patient's mouth for use.
 12. The intraoral device of claim 11, wherein the body includes an illumination member to be optically coupled to a light source for illumination of an interior of the patient's mouth.
 13. The intraoral device of claim 11, wherein the body terminates distally in a cheek portion that flexes when the body is disposed in the patient's mouth.
 14. The intraoral device of claim 11, wherein the lower walls form a tongue retractor portion.
 15. A one-piece, injection-molded intraoral device, comprising: a one-piece, flexible, injection molded body made of a single homogeneous material, the body including an upper front wall; an upper rear wall separated from the upper front wall by a gap, the upper front wall and the upper rear wall including a wave-shaped top edge, a lower front wall; a lower rear wall separated from the lower front wall by a gap, the lower front wall and the lower rear wall including a wave-shaped bottom edge; the upper walls joined to form an upper evacuation channel; the lower walls joined to form a lower evacuation channel; one or more evacuation holes in at least one of the upper walls and in communication with the upper evacuation channel; one or more evacuation holes in at least one of the lower walls and in communication with the lower evacuation channel, an illumination member to be optically coupled to a light source for illumination of an interior of the patient's mouth; and a connection section in communication with the upper evacuation channel and the lower evacuation channel and configured to extend outside of the patient's mouth to connect with a vacuum source for evacuating fluid from the patient's mouth through the evacuation holes and the evacuation channels.
 16. The intraoral device of claim 15, wherein the body terminates distally in a cheek portion that flexes when the body is disposed in the patient's mouth.
 17. The intraoral device of claim 15, wherein the lower walls form a tongue retractor portion. 